3. You are given the following sample of students' homework average and exam average. Assume the distributions are bell

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3 You Are Given The Following Sample Of Students Homework Average And Exam Average Assume The Distributions Are Bell 1 (53.6 KiB) Viewed 36 times

3. You are given the following sample of students' homework average and exam average. Assume the distributions are bell shaped. Homework Average Exam Average 81.9 87.3 86.7 79.6 78.5 68.0 92.3 97.5 93.3 86.3 a. Calculate the sample variance and sample standard deviation of both variables. b. For the last person/observation in the sample, find the number of standard deviations that each observation is from its respective mean. C. Calculate the proportion of exam averages that lie between 63.9 and 101.5. d. What percentage of homework averages are between 79.7 and 95.4? e. Calculate sample covariance. Interpret the covariance. f. Calculate the sample correlation coefficient. Interpret the result. g. Calculate the least squares/regression slope and intercept using homework average as the independent (x) variable. Interpret the slope and intercept. Find the change in a student's exam average if their homework average increased 0.5 percentage points, Predict a student's exam average if their homework average is 81.0.